4 Copyright (C) Andrew Tridgell 2006
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, see <http://www.gnu.org/licenses/>.
22 #include "system/network.h"
23 #include "system/filesys.h"
24 #include "system/wait.h"
25 #include "system/shmem.h"
26 #include "../include/ctdb_private.h"
28 int LogLevel = DEBUG_NOTICE;
29 int this_log_level = 0;
32 return error string for last error
34 const char *ctdb_errstr(struct ctdb_context *ctdb)
41 remember an error message
43 void ctdb_set_error(struct ctdb_context *ctdb, const char *fmt, ...)
46 talloc_free(ctdb->err_msg);
48 ctdb->err_msg = talloc_vasprintf(ctdb, fmt, ap);
49 DEBUG(DEBUG_ERR,("ctdb error: %s\n", ctdb->err_msg));
54 a fatal internal error occurred - no hope for recovery
56 void ctdb_fatal(struct ctdb_context *ctdb, const char *msg)
58 DEBUG(DEBUG_ALERT,("ctdb fatal error: %s\n", msg));
63 like ctdb_fatal() but a core/backtrace would not be useful
65 void ctdb_die(struct ctdb_context *ctdb, const char *msg)
67 DEBUG(DEBUG_ALERT,("ctdb exiting with error: %s\n", msg));
71 /* Invoke an external program to do some sort of tracing on the CTDB
72 * process. This might block for a little while. The external
73 * program is specified by the environment variable
74 * CTDB_EXTERNAL_TRACE. This program should take one argument: the
75 * pid of the process to trace. Commonly, the program would be a
76 * wrapper script around gcore.
78 void ctdb_external_trace(void)
81 const char * t = getenv("CTDB_EXTERNAL_TRACE");
88 cmd = talloc_asprintf(NULL, "%s %lu", t, (unsigned long) getpid());
89 DEBUG(DEBUG_WARNING,("begin external trace: %s\n", cmd));
91 DEBUG(DEBUG_WARNING,("end external trace: %s\n", cmd));
98 int ctdb_parse_address(struct ctdb_context *ctdb,
99 TALLOC_CTX *mem_ctx, const char *str,
100 struct ctdb_address *address)
105 se = getservbyname("ctdb", "tcp");
108 address->address = talloc_strdup(mem_ctx, str);
109 CTDB_NO_MEMORY(ctdb, address->address);
112 address->port = CTDB_PORT;
114 address->port = ntohs(se->s_port);
121 check if two addresses are the same
123 bool ctdb_same_address(struct ctdb_address *a1, struct ctdb_address *a2)
125 return strcmp(a1->address, a2->address) == 0 && a1->port == a2->port;
130 hash function for mapping data to a VNN - taken from tdb
132 uint32_t ctdb_hash(const TDB_DATA *key)
134 return tdb_jenkins_hash(discard_const(key));
138 a type checking varient of idr_find
140 static void *_idr_find_type(struct idr_context *idp, int id, const char *type, const char *location)
142 void *p = idr_find(idp, id);
143 if (p && talloc_check_name(p, type) == NULL) {
144 DEBUG(DEBUG_ERR,("%s idr_find_type expected type %s but got %s\n",
145 location, type, talloc_get_name(p)));
151 uint32_t ctdb_reqid_new(struct ctdb_context *ctdb, void *state)
153 int id = idr_get_new_above(ctdb->idr, state, ctdb->lastid+1, INT_MAX);
155 DEBUG(DEBUG_DEBUG, ("Reqid wrap!\n"));
156 id = idr_get_new(ctdb->idr, state, INT_MAX);
162 void *_ctdb_reqid_find(struct ctdb_context *ctdb, uint32_t reqid, const char *type, const char *location)
166 p = _idr_find_type(ctdb->idr, reqid, type, location);
168 DEBUG(DEBUG_WARNING, ("Could not find idr:%u\n",reqid));
175 void ctdb_reqid_remove(struct ctdb_context *ctdb, uint32_t reqid)
179 ret = idr_remove(ctdb->idr, reqid);
181 DEBUG(DEBUG_ERR, ("Removing idr that does not exist\n"));
187 form a ctdb_rec_data record from a key/data pair
189 note that header may be NULL. If not NULL then it is included in the data portion
192 struct ctdb_rec_data *ctdb_marshall_record(TALLOC_CTX *mem_ctx, uint32_t reqid,
194 struct ctdb_ltdb_header *header,
198 struct ctdb_rec_data *d;
200 length = offsetof(struct ctdb_rec_data, data) + key.dsize +
201 data.dsize + (header?sizeof(*header):0);
202 d = (struct ctdb_rec_data *)talloc_size(mem_ctx, length);
208 d->keylen = key.dsize;
209 memcpy(&d->data[0], key.dptr, key.dsize);
211 d->datalen = data.dsize + sizeof(*header);
212 memcpy(&d->data[key.dsize], header, sizeof(*header));
213 memcpy(&d->data[key.dsize+sizeof(*header)], data.dptr, data.dsize);
215 d->datalen = data.dsize;
216 memcpy(&d->data[key.dsize], data.dptr, data.dsize);
222 /* helper function for marshalling multiple records */
223 struct ctdb_marshall_buffer *ctdb_marshall_add(TALLOC_CTX *mem_ctx,
224 struct ctdb_marshall_buffer *m,
228 struct ctdb_ltdb_header *header,
231 struct ctdb_rec_data *r;
232 size_t m_size, r_size;
233 struct ctdb_marshall_buffer *m2;
235 r = ctdb_marshall_record(mem_ctx, reqid, key, header, data);
242 m = talloc_zero_size(mem_ctx, offsetof(struct ctdb_marshall_buffer, data));
249 m_size = talloc_get_size(m);
250 r_size = talloc_get_size(r);
252 m2 = talloc_realloc_size(mem_ctx, m, m_size + r_size);
258 memcpy(m_size + (uint8_t *)m2, r, r_size);
267 /* we've finished marshalling, return a data blob with the marshalled records */
268 TDB_DATA ctdb_marshall_finish(struct ctdb_marshall_buffer *m)
271 data.dptr = (uint8_t *)m;
272 data.dsize = talloc_get_size(m);
277 loop over a marshalling buffer
279 - pass r==NULL to start
280 - loop the number of times indicated by m->count
282 struct ctdb_rec_data *ctdb_marshall_loop_next(struct ctdb_marshall_buffer *m, struct ctdb_rec_data *r,
284 struct ctdb_ltdb_header *header,
285 TDB_DATA *key, TDB_DATA *data)
288 r = (struct ctdb_rec_data *)&m->data[0];
290 r = (struct ctdb_rec_data *)(r->length + (uint8_t *)r);
298 key->dptr = &r->data[0];
299 key->dsize = r->keylen;
302 data->dptr = &r->data[r->keylen];
303 data->dsize = r->datalen;
304 if (header != NULL) {
305 data->dptr += sizeof(*header);
306 data->dsize -= sizeof(*header);
310 if (header != NULL) {
311 if (r->datalen < sizeof(*header)) {
314 *header = *(struct ctdb_ltdb_header *)&r->data[r->keylen];
326 if possible, make this task real time
328 void ctdb_set_scheduler(struct ctdb_context *ctdb)
330 #if HAVE_SCHED_SETSCHEDULER
331 struct sched_param p;
332 if (ctdb->saved_scheduler_param == NULL) {
333 ctdb->saved_scheduler_param = talloc_size(ctdb, sizeof(p));
336 if (sched_getparam(0, (struct sched_param *)ctdb->saved_scheduler_param) == -1) {
337 DEBUG(DEBUG_ERR,("Unable to get old scheduler params\n"));
341 p = *(struct sched_param *)ctdb->saved_scheduler_param;
342 p.sched_priority = 1;
344 if (sched_setscheduler(0, SCHED_FIFO, &p) == -1) {
345 DEBUG(DEBUG_CRIT,("Unable to set scheduler to SCHED_FIFO (%s)\n",
348 DEBUG(DEBUG_NOTICE,("Set scheduler to SCHED_FIFO\n"));
354 restore previous scheduler parameters
356 void ctdb_restore_scheduler(struct ctdb_context *ctdb)
358 #if HAVE_SCHED_SETSCHEDULER
359 if (ctdb->saved_scheduler_param == NULL) {
360 ctdb_fatal(ctdb, "No saved scheduler parameters\n");
362 if (sched_setscheduler(0, SCHED_OTHER, (struct sched_param *)ctdb->saved_scheduler_param) == -1) {
363 ctdb_fatal(ctdb, "Unable to restore old scheduler parameters\n");
368 void set_nonblocking(int fd)
371 v = fcntl(fd, F_GETFL, 0);
372 fcntl(fd, F_SETFL, v | O_NONBLOCK);
375 void set_close_on_exec(int fd)
378 v = fcntl(fd, F_GETFD, 0);
379 fcntl(fd, F_SETFD, v | FD_CLOEXEC);
383 bool parse_ipv4(const char *s, unsigned port, struct sockaddr_in *sin)
385 sin->sin_family = AF_INET;
386 sin->sin_port = htons(port);
388 if (inet_pton(AF_INET, s, &sin->sin_addr) != 1) {
389 DEBUG(DEBUG_ERR, (__location__ " Failed to translate %s into sin_addr\n", s));
396 static bool parse_ipv6(const char *s, const char *ifaces, unsigned port, ctdb_sock_addr *saddr)
398 saddr->ip6.sin6_family = AF_INET6;
399 saddr->ip6.sin6_port = htons(port);
400 saddr->ip6.sin6_flowinfo = 0;
401 saddr->ip6.sin6_scope_id = 0;
403 if (inet_pton(AF_INET6, s, &saddr->ip6.sin6_addr) != 1) {
404 DEBUG(DEBUG_ERR, (__location__ " Failed to translate %s into sin6_addr\n", s));
408 if (ifaces && IN6_IS_ADDR_LINKLOCAL(&saddr->ip6.sin6_addr)) {
409 if (strchr(ifaces, ',')) {
410 DEBUG(DEBUG_ERR, (__location__ " Link local address %s "
411 "is specified for multiple ifaces %s\n",
415 saddr->ip6.sin6_scope_id = if_nametoindex(ifaces);
423 bool parse_ip_port(const char *addr, ctdb_sock_addr *saddr)
425 TALLOC_CTX *tmp_ctx = talloc_new(NULL);
431 s = talloc_strdup(tmp_ctx, addr);
433 DEBUG(DEBUG_ERR, (__location__ " Failed strdup()\n"));
434 talloc_free(tmp_ctx);
440 DEBUG(DEBUG_ERR, (__location__ " This addr: %s does not contain a port number\n", s));
441 talloc_free(tmp_ctx);
445 port = strtoul(p+1, &endp, 10);
446 if (endp == NULL || *endp != 0) {
447 /* trailing garbage */
448 DEBUG(DEBUG_ERR, (__location__ " Trailing garbage after the port in %s\n", s));
449 talloc_free(tmp_ctx);
455 /* now is this a ipv4 or ipv6 address ?*/
456 ret = parse_ip(s, NULL, port, saddr);
458 talloc_free(tmp_ctx);
465 bool parse_ip(const char *addr, const char *ifaces, unsigned port, ctdb_sock_addr *saddr)
470 /* now is this a ipv4 or ipv6 address ?*/
471 p = index(addr, ':');
473 ret = parse_ipv4(addr, port, &saddr->ip);
475 ret = parse_ipv6(addr, ifaces, port, saddr);
484 bool parse_ip_mask(const char *str, const char *ifaces, ctdb_sock_addr *addr, unsigned *mask)
486 TALLOC_CTX *tmp_ctx = talloc_new(NULL);
492 s = talloc_strdup(tmp_ctx, str);
494 DEBUG(DEBUG_ERR, (__location__ " Failed strdup()\n"));
495 talloc_free(tmp_ctx);
501 DEBUG(DEBUG_ERR, (__location__ " This addr: %s does not contain a mask\n", s));
502 talloc_free(tmp_ctx);
506 *mask = strtoul(p+1, &endp, 10);
507 if (endp == NULL || *endp != 0) {
508 /* trailing garbage */
509 DEBUG(DEBUG_ERR, (__location__ " Trailing garbage after the mask in %s\n", s));
510 talloc_free(tmp_ctx);
516 /* now is this a ipv4 or ipv6 address ?*/
517 ret = parse_ip(s, ifaces, 0, addr);
519 talloc_free(tmp_ctx);
524 This is used to canonicalize a ctdb_sock_addr structure.
526 void ctdb_canonicalize_ip(const ctdb_sock_addr *ip, ctdb_sock_addr *cip)
528 char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
530 memcpy(cip, ip, sizeof (*cip));
532 if ( (ip->sa.sa_family == AF_INET6)
533 && !memcmp(&ip->ip6.sin6_addr, prefix, 12)) {
534 memset(cip, 0, sizeof(*cip));
535 #ifdef HAVE_SOCK_SIN_LEN
536 cip->ip.sin_len = sizeof(*cip);
538 cip->ip.sin_family = AF_INET;
539 cip->ip.sin_port = ip->ip6.sin6_port;
540 memcpy(&cip->ip.sin_addr, &ip->ip6.sin6_addr.s6_addr[12], 4);
544 bool ctdb_same_ip(const ctdb_sock_addr *tip1, const ctdb_sock_addr *tip2)
546 ctdb_sock_addr ip1, ip2;
548 ctdb_canonicalize_ip(tip1, &ip1);
549 ctdb_canonicalize_ip(tip2, &ip2);
551 if (ip1.sa.sa_family != ip2.sa.sa_family) {
555 switch (ip1.sa.sa_family) {
557 return ip1.ip.sin_addr.s_addr == ip2.ip.sin_addr.s_addr;
559 return !memcmp(&ip1.ip6.sin6_addr.s6_addr[0],
560 &ip2.ip6.sin6_addr.s6_addr[0],
563 DEBUG(DEBUG_ERR, (__location__ " CRITICAL Can not compare sockaddr structures of type %u\n", ip1.sa.sa_family));
571 compare two ctdb_sock_addr structures
573 bool ctdb_same_sockaddr(const ctdb_sock_addr *ip1, const ctdb_sock_addr *ip2)
575 return ctdb_same_ip(ip1, ip2) && ip1->ip.sin_port == ip2->ip.sin_port;
578 char *ctdb_addr_to_str(ctdb_sock_addr *addr)
580 static char cip[128] = "";
582 switch (addr->sa.sa_family) {
584 inet_ntop(addr->ip.sin_family, &addr->ip.sin_addr, cip, sizeof(cip));
587 inet_ntop(addr->ip6.sin6_family, &addr->ip6.sin6_addr, cip, sizeof(cip));
590 DEBUG(DEBUG_ERR, (__location__ " ERROR, unknown family %u\n", addr->sa.sa_family));
591 ctdb_external_trace();
597 unsigned ctdb_addr_to_port(ctdb_sock_addr *addr)
599 switch (addr->sa.sa_family) {
601 return ntohs(addr->ip.sin_port);
604 return ntohs(addr->ip6.sin6_port);
607 DEBUG(DEBUG_ERR, (__location__ " ERROR, unknown family %u\n", addr->sa.sa_family));
613 void ctdb_block_signal(int signum)
617 sigaddset(&set,signum);
618 sigprocmask(SIG_BLOCK,&set,NULL);
621 void ctdb_unblock_signal(int signum)
625 sigaddset(&set,signum);
626 sigprocmask(SIG_UNBLOCK,&set,NULL);
629 struct debug_levels debug_levels[] = {
630 {DEBUG_EMERG, "EMERG"},
631 {DEBUG_ALERT, "ALERT"},
632 {DEBUG_CRIT, "CRIT"},
634 {DEBUG_WARNING, "WARNING"},
635 {DEBUG_NOTICE, "NOTICE"},
636 {DEBUG_INFO, "INFO"},
637 {DEBUG_DEBUG, "DEBUG"},
641 const char *get_debug_by_level(int32_t level)
645 for (i=0; debug_levels[i].description != NULL; i++) {
646 if (debug_levels[i].level == level) {
647 return debug_levels[i].description;
653 int32_t get_debug_by_desc(const char *desc)
657 for (i=0; debug_levels[i].description != NULL; i++) {
658 if (!strcmp(debug_levels[i].description, desc)) {
659 return debug_levels[i].level;
666 /* we don't lock future pages here; it would increase the chance that
667 * we'd fail to mmap later on. */
668 void ctdb_lockdown_memory(struct ctdb_context *ctdb)
671 /* Extra stack, please! */
673 memset(dummy, 0, sizeof(dummy));
675 if (ctdb->valgrinding) {
679 /* TODO: Add a command line option to disable memory lockdown.
680 * This can be a performance issue on AIX since fork() copies
681 * all locked memory pages.
684 /* Ignore when running in local daemons mode */
689 /* Avoid compiler optimizing out dummy. */
690 mlock(dummy, sizeof(dummy));
691 if (mlockall(MCL_CURRENT) != 0) {
692 DEBUG(DEBUG_WARNING,("Failed to lockdown memory: %s'\n",
698 const char *ctdb_eventscript_call_names[] = {
715 /* Runstate handling */
717 enum ctdb_runstate runstate;
720 { CTDB_RUNSTATE_UNKNOWN, "UNKNOWN" },
721 { CTDB_RUNSTATE_INIT, "INIT" },
722 { CTDB_RUNSTATE_SETUP, "SETUP" },
723 { CTDB_RUNSTATE_FIRST_RECOVERY, "FIRST_RECOVERY" },
724 { CTDB_RUNSTATE_STARTUP, "STARTUP" },
725 { CTDB_RUNSTATE_RUNNING, "RUNNING" },
726 { CTDB_RUNSTATE_SHUTDOWN, "SHUTDOWN" },
730 const char *runstate_to_string(enum ctdb_runstate runstate)
733 for (i=0; runstate_map[i].label != NULL ; i++) {
734 if (runstate_map[i].runstate == runstate) {
735 return runstate_map[i].label;
739 return runstate_map[0].label;
742 enum ctdb_runstate runstate_from_string(const char *label)
745 for (i=0; runstate_map[i].label != NULL; i++) {
746 if (strcasecmp(runstate_map[i].label, label) == 0) {
747 return runstate_map[i].runstate;
751 return CTDB_RUNSTATE_UNKNOWN;
754 void ctdb_set_runstate(struct ctdb_context *ctdb, enum ctdb_runstate runstate)
756 if (runstate <= ctdb->runstate) {
757 ctdb_fatal(ctdb, "runstate must always increase");
760 DEBUG(DEBUG_NOTICE,("Set runstate to %s (%d)\n",
761 runstate_to_string(runstate), runstate));
762 ctdb->runstate = runstate;